CRM Activity message us blocking access to CRM.

CRM Activity message us blocking access to CRM.

Cannot access CRM.
Message about ZOHO change to activities is blocking access.
Clicks anywhere on CRM screen don't do anything.  The click is rejected.
ZOHO CRM Support told me I don't have a problem.  This is after I sent them screen shot of problem.
ZOHO CRM Support has no idea what to do.
This has shut my business down.
HELP!
Tom